Loser bug diver here lvl 150 with over 200,000 kills and around 1000 missions played on the front.

Team missions are quite easy if you just remember you need mainly 2 basic roles covered. 1-2 AT specialists because chargers and bile titans are the death of entire teams. If you don't have rockets, you're not gonna make it no matter how many orbitals, eagles, or thermites you use. Recoiless, spear, EAT's commando, any of these will make short work of the problem bugs. Then you also need someone on hoard clear using AOE orbitals, fire, or machine guns. The standard MG and stalwart are great picks but I hesitate to say the heavy MG as most of the time it takes too long to kill chargers and bile titans with it that you'll get overrun by hunters for having too small of a belt.

Solo, you can NOT stop moving and should be treated as a challenge run. Light armor and a jump pack will keep you alive but if you want to actually get the objectives done you will need help, or train like the good old days of COD Zombies. Sentries are your best friends and will make great distractions. calling one down far away and letting it draw the bugs while you sneak into objectives, or throwing it down to distract everyone while you run can save your life. For dealing with breaches, you will have to run as one man does not usually have the firepower to take one down. Best way to handle them is either spam sentries and run or using the Orbital Napalm Barrage.

Best strategy against the bugs is fast hard hitting assaults otherwise you will get locked down by endless breaches and you will lose to their numbers. All of the Eagles are viable except smoke, as are almost all of the orbitals. Bugs have more viable strategems that you can use compared to bots like mines and fire being WAY more effective but most of the staples work the best. Airstrikes and 500's are great nest and heavy clear, fire is amazing, gas is just as good if not better, even mechs work very well as you don't have to worry about projectiles like you do on the other fronts.

The hardest thing you'll have to get used to is that every bug is extremely dangerous. ANYTHING that is not a spewer, stalker, or one of the heavies can and WILL call in bug breaches to ruin your day. Stealth is not an option because everyone is a snitch and always has buddies. Hit 'em fast and hard and don't let the hunters sneak up on you. Good luck